Lamp-jack.



T. H. GARLAND.

LAMP JACK.

LIPLIOATION FILED DEC. 14, 1907.

Patented Jan. 19. 1909.

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THOMAS-H. GARLAN D, OF CHICAGO, ILLINOIS.

LAIdP-J'AGK.

no. scones.

Specification of Letters Patent.

Patented Jan. 19, 1909.

Application filed December 14, 1907. Serial No. 406,431.

20 all whom it may concern: i

known that I, THOMAS H. GARLAND,

improvements in Lamp-Jacks, of which following is a specification.

T his invention relates to improvements in jacks of that general type commonly ycd for protecting the draft or chimney openings through car roofs and the like which conduct oil the products of combustion from the lamps r burners employed for lighting the car.

Among the salient objects of the invention are to provide device which, while atl'ording steady and free out-draft which will eiiicicntly carrymtl the products of combustion, will nevertheless be entirely free. from baclcdraits, 2'. e. in-d *afts from the outside; to provide a construction in which the outlet is so disposed and hooded that ingress of cinders, dust, rain, snow, etc, is impossible and the effects of outer currents of air nullified or rendered non-objectionable; to pro- Figure It is a side elevation of the lamp "aclr, detached; Fig. 2 is a perspective view jack, detached; Fig. 3 is a secopal vinr taken transversely through a car on and axially through the lamp jack aplied to the roof of the car; Fig. 4 is a. c lonal View taken on line 4.--4. of Fig. 3 and looking in the direction of the arrows; Fig. 5 is a sectional view taken at right angles to that of'Fig. i and centrally through the device, the jack shown in this view being provided with two oppositely disposed outlet extensions.

Referring to the drawings,'l designates the roof of the deck portion of an ordinary passenger car, provided with a vent or chimney opening 2, underneath which is arranged a suitable lamp or burner from which the interior of the car is lighted. In the present instance an ordinary Pintsch gas light is shown and designated 3.

t designates as a whole a lamp jack constituting a preferred embodiment of the invention; The device is ordinarily made of sheet metal and comprises a cylindric upright main body or chimney member 5, seated in a base flange or plate 6 and provided at its upper end with a closure 7, which desirably takes the form of a' flat plate which covers the chimney and extends laterally and horizontally outward, as indicated at 7'. The base plate 6 is likewise extended laterally, as indicated at 6, and between the outer ends of the two extensions 6 and 7 is secured an upright plate 8. The object of the extensions (5, 7 and the end member 8 is to form an open ended laterally disposed passage. or cowl into and through which the chimney portion of the lamp jack discharges. To this end, the member 5 is provided in its upper portion, in register with the median line of the cowl extension, with an approximately V-shaped opening 9, best shown in Fig. i, and between-the end plate 8 and the proximate side of the cylinder member 5, at each side of the opening 9, is secured a curved plate 10; the arrangement of these plates 10 being such that, together with the overlying extension 7 and the parts between which they are interposed, they form a laterally exteuding conduit which. communicates with the chimney member 5 at one end and has in its lower side, extending throughout its length, a slot-like opening 11 (see Figs. 2 and at). The two members 10 are so curved that their upper and lateral outer edge portions 10 meet the lateral edges of the extension 7 and their external surfaces are curved inwardly and downwardly, as seen clearly in Fig. at. As thus constructed it will be seen that when the lamp jack is moving bodily with the car, with 1ts lateral cowl extension arranged transversely of the car, the curved plates 10 serve as deflectors to direct the air, which is gathered by the forward motion of the car, and flows through this laterally disposed passage or cowl extension from front to rear, downwardly, across and beneath the opening 11 of the lateral conduit leading from the chimney chamber 5. Inasmuch as the cowl extension is symmetrical in its construction, this action will follow whichever direction the car travels.

The n right plate member 8 and the opposed si e portions of the chimney member 5 effectually prevent side drafts from striking the outlet of the device and it follows that only direct drafts caused by the fn'ard motion of the car flow through the cowl, and

these drafts, by reason of the deflecting action of the plates 10, cannot enter the outlet of thejack but on the contrary create an eductive action beneath-the opening 11 and thus augment the out-draft through the jack. The same construction and arrangement which effectually prevents the in-flow of disturbing drafts, serves also to effectually preent the entrance of dust, cinders, smoke and the weather elements. It is also to be noted that the device is devoid of recesses and lodging places where cinders and the like might accumulate to interfere with the perfeetoperation of the jack. Furthermore'the construction is such that it can be manufactured at moderate cost.

In the device shown in Fig. 5, I have simply provided the jack with a lateral extension at each side instead of one only; these lateral extensions being. each substantially identical with that shownand described in Figs. 1, 2, 3 and 4.

It will be obvious that the construction may be modified without departing from the spirit of the invention.

1 claim as my invention;

1. A lamp jack comprising an upright chimney or uptake-duct, an open-ended airgathering housing at one side of said chimney, in juxtaposition thereto and forming an air passage extending substantially in line with the direction of onward movement of the car and across the outside of the chimney wholly below the outlet thereof, and a lateral extension duct communicating with the upper part of said chimney and discharging downwardly and directly into said passage formed by said air-gathering houslng.

2. A lamp jack comprising an upright chimney or uptake-duct, a flared, openended, air gathering housing at one side of said chimney, in juxtaposition thereto and air gathering housing, whereby the accel-v erated flow of air gathered and directed through said housing acts eductively upon the outlet of said lateral extension duct.

3. A lamp jack comprising a chimney'or up-take duct, a laterally extending extension ductcommunicating with the upper portion of said chimney and provided with a downwardly directed discharge opening, a housing arranged to protect the discharge 0pening of said extension duct against lateral drafts, and deflectors arranged to deflect cross drafts downwardly as they pass through said housing.

at. A lamp jack comprising a chimney ,or up-take member, a cover plate closing the upper end of said chimney member and extending laterally therefrom, a pair of downwardly converging deflector plates arranged beneath the extension portion of the cover plate and forming in conjunction with the latter an extension duct, provided with an opening at its lower side, an upright housing plate extending from the outer end of said cover plate extensiondownwardly across and closing the outer end of said extension duct.

THOMAS H. GARLAND Witnesses T. A. DEEGAN, D. J. NoRMoYLE. 

